It seems that Minecraft.net Auth servers are down and has kicked everyone off. Our servers are running normally but ALL Minecraft servers are down around the world. We will update you once we are 100% when Minecraft.net is responding again. Notches Tweet: http://twitter.com/notch/status/219880776983003136 Update: Minecraft.net is back online and you can now connect! Update 2: If you get "failed to verify username" try closing your client and relog in. If that doesnt help, try again and repeat this step every 15 minutes. Mojang is working on it!